Perhaps you should try some spelling variations:
"environmental philosophy" » "experimental philosophy", "continental philosophy", "environmental physiology"
"environmental sociology" » "environmental psychology", "environmental social", "environmental geology"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("environmental philosophy") OR ("environmental sociology")).
• Removing quotes may allow a broader search: (( environmental philosophy ) or ( environmental sociology )).
• Adding a wildcard symbol may retrieve word variants: (("environmental philosophy") or ("environmental sociology"))*.